Because Build 7850 was so early in development, it looks almost identical to Windows 7. However, it contains several hidden "prototypes" of features that eventually defined Windows 8: Ribbon UI:
Before you search for a download link, you need context. Build 7850 is a build from February 22, 2011. It was leaked on April 12, 2011. download windows 8 build 7850 iso top
Offers the official x86 Enterprise SKU.
Alternatively, you can consider purchasing a copy of Windows 10 or later, which offers many improvements and new features over Windows 8. Because Build 7850 was so early in development,